Mold



M. GUYOT Febv 19, 1929.

MOLD

Filed June 15 1927 2 Sheets-Sheet 1 INVENTOR B\Y 2 3 7 ATTORNEYS PatentedlF eb. 19, 1929.

UNITED STATES PATENT OFFICE- MABIUS GUYOT, OF CLEVELAND, OHIO, ASSIGNOR TO ALUMINUM COMPANY OI AMERICA, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

MOLD.

Application filed June 15, 1927. Serial No. 198,895.

This invention relates tomolds forcasting metal articles.

An object of the invent-ion is to provide a mold which will form castings in rapid succession. V

Another object is to reduce the manual movements which must be made by an operator in operating the apparatus.

Other objects will hereinafter appear.

The invention vwill be better understood from the description of one practical embodiment thereof illustrated in the accompanying drawing in which,

Fig. 1 is a plan view of a mold and its associated parts.

Fig. 2 is a transverse section taken on the line 2-2 of Fig. 1, and,

Fig. 3 is a section taken at right angles to that of Fig. 2, on line 3-3 of Fig. 1.

Fig. 4 is a fragmentary detail view of the cradle supporting and guiding means.

The mold shown'comprises three relatively movable sections, twos1des 1 and 2, and bottom 3 having projecting cores secured thereto as shown. In the drawings, two mold cavities are shown, the side sections of which are common and the bottom sections carried on a common cradle, with which they may be integral.

The mold is carried on a horizontal frame or bed 4 supported by legs v5. The side sections of the mold may slide along the top of the bed and are provided with rods 6 having rack teeth 7 cut into their lower edges by which they may be reciprocated by gears 8. The gears are keyed to two shafts 9 ]o11rnalled on the bed and having operating handles 10 as shown, so that either side section can be advanced or retracted by swinging its handle.

The bottom mold sections are carried on a cradle lltrunnioned on the bed, there being two bottom sections for each cavit the sections being placed on opposite si es of the cradle. A rod 12, carrying an actuating handle 13, extends through bearings in the cradle and longitudinally thereof, by which the cradle-may be rocked on its trunnions. A p

sector-shaped guard 14 carried by the bed limits the movement of rod 12 and, when this is at one or the other end of the guard, locates the-cradle with one or the other set of bottom mold sections in operative position.

The cradle 11 is conveniently made as shown, comprising top and bottom plates 11' and a central piece 11", into recesses in the ends of which the trunnions 15 extend. i

- Beneath the mold cavities are apertures 16 in the plates 11, and extending between these, are openings 17 of greater diameter through piece 11:. Within and extending through the openings and apertures are ejector plungers 18, each consisting of acentral portion fitting its opening 17, and reduced ends fitting apertures 16. The ends of the central portion form shoulders which abut the plates 11' at the sides of the apertures and thus limit the movement of the plungers so that one end may move into alignment with, but not beyond, the outer surface of the top plate, and

when in such alignment forms part of the bottom of the mold cavity.

One edge of the central portion of each plunger has teeth cut therein, forming a rack 19, and rod 12 has corresponding teeth out as at 20 to engage each rack.

It will thus be seen that rotation of rod 12 relative the cradle will cause the plungers to project and dislodge castings from the cradle. 1 The operation of the apparatus is as folows The mold parts are moved together asshown in the drawings and the metal cast therein. After this, the operator swings handles 10, thus retracting side sections 1 and2 and leaving the newly formed castings upon bottom sections 3. Next, he rotates handle 13 through 180 which inverts cradle 11.

This brings the other set of mold bottom seccastings which drop beneath the cradle. The

plungers continue I their downward movement until the tops are flush with the top late. The operator now swings handles 10 to return the side sections to casting. position and is ready to repeat the casting operation.

The bottom sections drop all dirt which may have accumulated as well as the castr ings, and have an opportunity to cool, between casting operations.

It will be understood that my improved device may be utilized in making a variety of diiferent castings simply by substituting suitably formed mold parts on the members 11' for the mold parts 3 and substituting suitably formed mold parts for parts 1 and 2 which slide on table 4 and plates 11'.

While I have described one embodiment of my invention with some particularity it is obvious that many others will occur to those skilled in the art to which it appertains and I do not, therefore, limit myself to the precise details illustrated but claim as my in vention all embodiments, variations, and modifications coming within the scope of the appended claims.

I claim:

1.. A mold'having complementaryside sections and a plurality of pivoted identical bottom sections.

2. A mold having complementary side sections and a plurality of interchangeable bottom sections supported for rotational movement to present the bottom sections to the side sections.

3., A mold having complementary laterally movable side sections and rotatable bottom sections pivoted below said side sections.

4. A mold comprising laterally movable side sections a plurality of bottom sections engageable therewith and a movable support bringing said bottom sections successively into position to engage said side sections.

5. A mold apparatus comprising a table, complementary mold side sections movable thereon, means for moving said sections, a.

mold bottom section supported on trunnions below said table, and means to tilt said bottom section.

6. A molding apparatus comprising a table having a frame-like top, complementary mold side sections movable thereon, a tiltable cradle trunnioned below said top, a plurality of mold bottom sections carried by said cradle, and means for tilting said cradle to selectively bring one of said bottom sections into operative position with respect to said side sections.

7. A molding apparatus comprising mold side sections, a mold bottom section'rotatably "mounted, means for limiting the rotation of the bottom section, and means for rotating said section.

8. A mold having a rotatable bottom section and an automatic ejector for removing castings therefrom.

9. A mold having a movable bottom section, means for moving said bottom. section, and an ejector automatically operated at a predetermined point in the motion of said section.

10. A mold comprising laterally movable side sections, a mold bottom provided with a plurality of surfaces each adapted to form the bottom of the molding cavity, the bottom being movable to bring said surfaces successively into position to engage said side sections.

In testimony whereof I hereunto affix my signature this 10th day of June, 1927.

MARIUS GUYOT. 

